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A 22 GHz cascode CMOS VCO using frequency doubler
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- Authors
- Bong Hyuk Park, Seung Sik Lee, Song Cheol Hong, Sang Sung Choi
- Issue Date
- 2007-11
- Citation
- Microwave and Optical Technology Letters, v.49, no.11, pp.2870-2873
- ISSN
- 0895-2477
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- Abstract
- This paper presents a fully integrated cascode CMOS LC VCO using frequency doubler for oscillating at 22 GHz band. A symmetrical cascode coupling topology is implemented with negative conductance scheme for increasing the quality factor and output swing. Therefore, this architecture improves the phase noise characteristic in 0.18 μm CMOS technology. In order to oscillate at 22 GHz band the frequency doubler (clipper) is used. The measured phase noise is -102.4 dBc/Hz at the I MHz offset frequency. The tuning range of 1.32 GHz is obtained with the control voltage from 0.5 to 1.6 V. The current consumption of the VCO and the frequency doubler has 11.8 mA from 1.8 V supply. © 2007 Wiley Periodicals, Inc.
- KSP Keywords
- CMOS Technology, CMOS VCO, Cascode CMOS, Coupling topology, Current consumption, Frequency doubler, Fully integrated, GHz band, LC voltage controlled oscillator(LC-VCO), Noise characteristics, Output swing